MySQL数值函数

MySQL数值函数

MySQL的数字函数主要用于数字处理和/或数学计算。下表详细列出数字函数,这些函数可以在MySQL中执行。

名字 描述
ABS() 返回数字表达式的绝对值。
ACOS() 返回数字表达式的反余弦值。如果值是不在范围-1到1,则返回NULL。
ASIN() 返回数字表达式的反正弦。返回NULL,如果值不在范围-1到1
ATAN() 返回数字表达式的反正切。
ATAN2() 返回传递给它的两个变量的反正切。
BIT_AND() 返回按位AND运算表达中的所有位。
BIT_COUNT() 返回传递给它的二进制值的字符串表示。
BIT_OR() 返回传递表达的所有位的位或。
CEIL() 返回最小的整数值但不能比传递的数字表达式小
CONV() 表达式从一个基数到另一个基数转换的数字。
COS() 返回传递数字表达式的余弦值。数字表达式应该用弧度表示。
COT() 返回传递数字表达式的余切。
DEGREES() 返回数字表达式从弧度转换为度。
EXP() 返回数值表达式的自然对数(E)为基数的幂。
FLOOR() 返回最大整数值但不能大于通过表达式数值。
FORMAT() 返回数字表达式舍入到小数位数。
GREATEST() 返回输入表达式的最大值。
INTERVAL() 需要多个表达式exp1, exp2和exp3等..如果为exp1小于exp2返回0,如果为exp1小于exp3返回1等。
LEAST() 给两个或两个以上时,返回所有输入的最小值。
LOG() 返回通过数字表达式的自然对数。
LOG10() 返回传递表达的基数为10对数的数值。
MOD() 返回表达式由另一个表达式除以剩余部分。
OCT() 返回通过数字表达式的八进制值的字符串表示。如果传递值为NULL,返回NULL。
PI() 返回圆周率的值
POW() 返回一个表达式到另一个表达的次方值
POWER() 返回一个表达式到另一个表达的次方值
RADIANS() 返回传递表达从度转换为弧度值
ROUND() 返回数字表达式四舍五入到整数。可用于舍入表达式为小数点数值
SIN() 返回给定的数字表达的正弦值(弧度)
SQRT() 返回数字表达式的非负平方根
STD() 返回数字表达式的标准偏差
STDDEV() 返回数字表达式的标准偏差
TAN() 返回以弧度表示数值表达式的正切值。
TRUNCATE() 返回exp1小数位数字截断到exp2。如果exp2为0,则结果将没有小数点。

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